a module, say M here and read <file:Documentation/modules.txt>.
If unsure, say N.
+config SERIAL_8250_HCDP
+ bool "8250/16550 device discovery support via EFI HCDP table"
+ depends on IA64
+ ---help---
+ If you wish to make the serial console port described by the EFI
+ HCDP table available for use as serial console or general
+ purpose port, say Y here. See
+ <http://www.dig64.org/specifications/DIG64_HCDPv10a_01.pdf>.
+
config SERIAL_8250_EXTENDED
bool "Extended 8250/16550 serial driver options"
depends on SERIAL_8250